[MTD] Make init_rpxlite function static

The function init_rpxlite, which is not used outside of
drivers/mtd/maps/rpxlite.c, can become static. Add the
needed keyword.
Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@movial.fi>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/maps/rpxlite.c

@@ -23,7 +23,7 @@ static struct map_info rpxlite_map = {
 	.phys = WINDOW_ADDR,
 };
 
-int __init init_rpxlite(void)
+static int __init init_rpxlite(void)
 {
 	printk(KERN_NOTICE "RPX Lite or CLLF flash device: %x at %x\n", WINDOW_SIZE*4, WINDOW_ADDR);
 	rpxlite_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);